Coupling device



May 16, 1939. K. BEYERLE 2,158,103

COUPLING DEVICE Filed sept. 14, 1955 f ff i e i 9 6 i Q 79 S l l l a A "wsssff" 7 3 ".f INVENTOR KON RAD BEYER LE vl V5 4/ ,73 BYLQK ATTORN EY Patented May 16, 1939 UNITED STATES PATENT OFFICE COUPLING DEVICE Application September 14, 1935, Serial No. 40,555

3 Claims.

This invention is concerned with a coupling device for radio-frequency signal or communication equipment of the kind employed, for instance, in apparatus for radio telephony or telegraphy or in radio transmission over lines, more particularly power lines. In coupling devices of the kind known in the prior art, the various coupling coils have been disposed upon a stationary and fixed supporting structure in such a Way that a plurality of coupling elements were mounted together, according to the requirements of the case. For the purpose of shielding the parts, or some of them, protective caps were shifted over the same. The dimensions of the supporting structure and the caps or cans varied according to the circuit scheme used in a given instance.

Now, the present invention makes it possible to use uniform or standardizedvcoupling elements, no matter what particular circuit arrangement is employed, this being made feasible by the fact that the coupling coils are built into a pot-shaped casing of conducting material in such a way that by adjusting means operable from the outside, the coupling coils may be shifted in reference to one another. The leads brought to the different coils are secured upon the outside or the top end of such a coupling pot so that the same may be used in the form of a self-contained construction element or unit for all kinds of radio-frequency circuit arrangements.

An exemplified embodiment of this invention is schematically illustrated in the drawing, Figs. 1 and 2 illustrating a coupling pot, as here disclosed in longitudinal section, While Fig. 3 is a top view, a portion of which is shown in section in order to more clearly indicate the adjustable means located Within the container.

Referring to the drawing, I denotes the potshaped shielding cylinder or metallic container; 2 is a movable coil, and also coil 4 ls movable. Both these coils are in variable coupling relationship with the fixed coil 3. A case of this kind arises in radio-frequency communication work whenever an input circuit, say, an antenna lead, is to be associated with both the sending and the receiving circuit. 'I'hen a triple-type coupler device is used, the xed or stator coil 3 being connected with the antenna circuit and one of the movable coils 2 and 4 in the receiving and the sending circuit, respectively. Coils 2 and 4, as especially clearly shown in Fig. 2, make it clearly apparent that the scheme readily admits of the use also of coils comprising a greater number of taps. 'Ihe various taps and the beginning and the end leads of the coils are brought to terminal insulated mounting strips 5, 6, 'I, respectively by means of flexible leads. Coil 3 is provided with a coat 8 consisting of a high-grade electric insulating material such as mica, and wrapped upon the said layer` of mica is a layer 9 consisting of radiofrequency stranded wire (Litzedraht) which, by way of Wire I0, is lbrought to a ground terminal Il. 'Ihe said coat serves as an electrostatic protection or shield. The coils 2 and 4 are mounted upon securing plates or sliding panels I2 and I3 and bases 2 and 4. These are rigidly connected with traveling screw threaded metallic strip members I4 and I5 which are turned or bent around the screw-threaded rods or Worms IE and I 'I so that by turning the handle I8, for instance, the top coil can be moved downwardly or upwardly if preferred, and by a similar handle the lower coil upwardly or downwardly if preferred. The coil 3, on the contrary, is secured fixedly inside the metallic container by panel I9 and base 3 It will be understood that the arrangement of this invention is not only useful to triple-type couplers as here shown, but also to coupling devices comprising some other number of coils.

Having thus described my invention, what I claim is:

1. A radio frequency coupling device comprising a metallic container having longitudinally extending side walls, a xed coil having shielding 5' means comprising a layer of insulation upon which is wound a layer of wire, said wire being electrically connected to a ground terminal of said device, said fixed coil located within and supported by a panel fixed on one of the side walls of said container, a pair of movable coils in inductive relationship with said iixed coil and mounted on separate sliding panels, a plurality .of adjustable means located in different corners of said container, each adjustable means being coupled tota different one of said sliding panels for the purpose of moving each one of said movable coils to change its inductive relationship with said xed coil.

2. A radio frequency coupling device comprising a metallic container having longitudinally extending side `Walls, a fixed coil having shielding means comprising a layer of insulation upon which is wound a layer of wire, said wire being electrically connected to a ground terminal of said device, said lxed coil located within and supported by a panel fixed on one of the side walls of said container, a pair of movable coils in inductive relationship with said xed coil and mounted on separate sliding panels, said movable coils having taps, a. plurality oi terminals mounted on an insulating strip at the top of said container for making external connections to the leads of said coils and said taps, a plurality of adjustable means located -in different corners of said container, each adjustable means being coupled to a different one ofrsaid sliding panels for the purpose of moving each of said movable coils to change its inductive relationship with said fixed coil.

3. A radio frequency coupling device comprising a metallic container having longitudinally extending side walls, a xed coil having shielding means comprising a layer of insulation upon which is wound a layer of wire, said wire being electrically connected to a ground terminal of said device, said fixed coil located within and supported by a panel lixed on one oi the side walls of said container and located parallel therewith, a pair of movable coils in inductive relationship with said xed coil andmounted on separate sliding panels located parallel with the other side walls of said container; said movable -coils having taps, a plurality of terminals mounted on an insulating strip at the top of said container for making external connections to the leads of said coils and said taps, a plurality of adjustable means located in different corners of said container, said adjustable means comprising a threaded rod-like member cooperating with a threaded nut, each of which is coupled to a different one of said sliding panels for the purpose of moving each one of said movable coils to change its inductive relationship with iespect to said fixed cou.

KONRAD BEYERLE. 

